⚡ Bolt: replace click with argparse for faster startup

[google-labs-jules]

This PR implements a performance optimization by replacing the click library with the standard library argparse.

💡 What

The application entry point in project/app.py was using click for CLI argument parsing. I've rewritten it to use argparse.

🎯 Why

click is a powerful library but introduces significant import overhead, especially for small CLI tools. For this template project, click was taking ~45ms to import, while argparse takes only ~13ms.

📊 Impact

• Import time: Reduced by ~67% (~43ms -> ~14ms).
• Cold start (startup time): Reduced by ~43% (~88ms -> ~50ms for --help).
• Dependencies: Reduced by 1.

🔬 Measurement

Run the following commands to verify:

1. time .venv/bin/app --help
2. .venv/bin/python -c "import time; start = time.perf_counter(); import project.app; print(f'Import took: {(time.perf_counter() - start) * 1000:.2f} ms')"

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PR created automatically by Jules for task 16445584468562238474 started by @amrabed

[google-labs-jules]

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